Process for the manufacture of a substitute for the sericin soap for dyeing silk, silk-spuns, and silk tissues.



UNITED STATES PATENT OFFICE.

PETER SGHMID AND KARL GROSS, OF BASEL, SWITZERLAND; SAID GROSS A'SSIGNOR TO SAID SCHMID.

PROCESS FOR THE MANUFACTURE OF A SUBSTITUTE FOR THE SERICIN SOAP EOR DYEING SILK, SILK-SPUNS, AND SILK TISSUES.

No Drawing.

To all to hom it may concern Be it known that we, PETER SoHMID, a citizen of the Swiss Republic, and KARL GRoss, a subject of the King of Prussia, both residing in Basel, Switzerland, have invented a new Process for the Manufacture of a substitute for the Sericin Soap for Dyeing Silk, Silk-Spuns, and Silk Tissues, of which the following is a full, clear, and exact specification.

It is known, that for dyeing silk almost never is sericin soap at hand in sufficient quantites. l or this reason many attempts have been made to utilize various substances and preparations for producing artificial sericin soap; but until now no substitute of this kind has been found which would be able to replace the sericin soap. produced by 'ungumming silk. We have now found, that an excellent substitute for sericin soap can be obtained by boiling silkworm-chrys'alises or' silk-wastes containing silkwormchrysalises. as for instance bassinets (Italian gallettamm', French pelettes). By preparing this substitute for sericin soap an alkali metal carbonate, as soda may be added to the water used, in order to saponify simultaneously the oils and greases contained in the chrysalises. The substitute for sericin soap obtained according to the new process contains mainly substances approaching by their chemical compositions that of the sericin, whereby when using the same in dyeing, the touch, the luster, the elasticity and the strength of the fiber and its regular coloration are influenced favorably.

Example: In a vat of 600 liters, provided with a steam coil and disposed above a reservoir containing 5000 liters pure water, are introduced 175 kg. bassinets and the vat is filled with pure water. the vat are constantly maintained warm by supplying steam to the coil. As soon as the chrysalises dissolve, a little stream of the vat contents is allowed to flow through a cloth filter into the 5000 liters of water contained in the reservoir and by adding gradually bassinets into the yet the quantity of bassinets is continually maintained in the vat in the same amount, and by a continual supplying of water the vat is Specification of Letters Patent.

Application filed October 7, 1915.

The contents of Patented Sept. 26, 1916.

Serial No. 54,500.

continually maintained filled with water.-

soda, for instance in proportion of 5 per cent. of the weight of the employed bassinets, can be added to the vat contents and in this case the vat contents can every day be heated to ebullition for about 1}- hour, whereby the oils and greases of the chrysalises are partly saponified.

What we claim is:

1. The described process for the manufacture of a substitute for sericin soap for dyeing silk, silk wastes, silk spuns and silk tissues, consisting chrysalises with water.

2. The described process for the manufacture of a substitute for sericin soap for dyeing silk, silk wastes, silk spuns and silk tissues, consisting in boiling silkwormchrysalises with water containing an alkali metal carbonate, in order to saponify the oils and greases of the chrysalises.

3. The described process for the manufacture of a substitute for sericin soap for dyeing silk, silk wastes, silk spuns and silk tis sues, consisting in boiling silk-wastes containing silkworm-chrysalises with water.

'4. The described process for the manufacture of a substitute for sericin soap for dyeing silk wastes, silk spuns and silk tissues, consisting in boiling silk wastes containing silkworm-chrysalises with water containing an alkali metal carbonate, in order to saponify the oils and greases of the chrysalises.

In witness whereof we have hereunto signed our name this 14th day of September in boiling silkworm- 1915, in the presence of two subscribing witnesses.

Witnesses ARNOLD ZUBER, AMAND BITTER. 

